The historical detective story is based on real events that occurred in Innsbruck in November 1904. Just one day and one victim! But what happened there received wide resonance. We look at this tragedy from today and understand that the world was then entering a completely different era - into the dramatic and sacrificial 20th century, in whose wars millions died. The Innsbruck events, according to the author, became “a symptom of everything that happened later and continues to happen to this day.” That is why “Black Friday Innsbruck”, described in such detail, arouses genuine interest and reflection in the reader about the fate of the world.